In developing countries there is increase prevalence of smokers, and in high income countries, high prevalence of aging population, hence prevalence of COPD is expected to rise over next 30years and by 2030 it is estimated that 4.5million deaths occur annually from COPD and related conditions. All the patients presenting to Respiratory medicine department admitted with diagnosis of acute exacerbation of COPD. A sample size of 60 patients (30 interventional and 30 control) were taken by using single proportion- absolute precision method. Out of 60 patients, 90%(54) of them were males, 10%(6) were females. Both in cases and controls, males were 90%(27) and females were 10%(3). Out of 60 patients, 54(90%) were smokers and all were males, 6(10%) patients were non-smokers and all were females. Both in cases and controls, 90%(27) were smokers, 10%(6) were non-smokers. The mean duration of illness among cases was 6yrs and controls was 4yrs.